The Phase 2 Fleece Jacket - Breathable, Insulating, Wind Resistant, High Visibility Outerwear. An innovative jacket constructed from a combination of 150 denier fluorescent yellow-green polyester and 360 gram black fleece that keeps you warm and visible, yet cool and comfortable for 3 season protection. ANSI/ISEA 107 Class 3 compliant jacket for high visibility. Athletic apparel design and performance adapted for work environments. Insulating heavy weight fleece provides warmth and comfort.